title: A model for the dynamics of mammalian family X DNA polymerases.
abstract: Based on available structural studies, a model is presented for polymerization dynamics of mammalian family X DNA polymerases, including polymerases β, λ, μ, and terminal deoxynucleotidyl transferase (TdT). Using the model, distinct polymerization activities and processivities of the four polymerases acting on different forms of DNA substrate are analyzed and studied theoretically. A "gradient" of template dependence of polymerases β, λ, μ, and TdT is well explained. The much higher occurrence frequencies of the -1 frameshift DNA synthesis by pols λ and μ than that by pol β are well explained. The theoretical results on the polymerization processivities are also in agreement with the available experimental data.
authors.affiliation: Key Laboratory of Soft Matter Physics and Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China. pxie@aphy.iphy.ac.cn
authors.forename: Ping
authors.initials: P
authors.lastname: Xie
mesh_terms: D000818:Animals; D001665:Binding Sites; D004247:DNA / Q000378:metabolism; D004259:DNA-Directed DNA Polymerase / Q000378:metabolism*; D008322:Mammals / Q000378:metabolism*; D008954:Models, Biological; D005810:Multigene Family; D058105:Polymerization; D011485:Protein Binding; D013698:Templates, Genetic
chemical_list: D004247:DNA; C109534:DNA polymerase X; D004259:DNA-Directed DNA Polymerase